A clinic measured hormone concentrations during a cycle in which no mature egg was released.
| Day | Oestrogen concentration (pmol/L) | LH concentration (IU/L) |
|---|---|---|
| 11 | 310 | 5 |
| 13 | 580 | 5 |
| 14 | 740 | 6 |
| 15 | 620 | 5 |
| 16 | 430 | 4 |
Explain why the pattern in the table suggests that the hormonal changes did not trigger ovulation.
Assuming ovulation does not occur, predict how the progesterone concentration on day 20 would compare with its concentration after ovulation. Explain your answer.
90 exam-style questions on Edexcel GCSE Biology 7.2 Reproductive hormones, covering 7.2.1 Stages of the menstrual cycle, 7.2.2 Hormonal control of the menstrual cycle, 7.2.3 Hormonal contraception, 7.2.4 Evaluating contraception methods, and 7.2.5 Hormones in Assisted Reproductive Technology. Each one has a worked solution and a mark scheme showing where the marks go.